The CSI crew try to pinpoint the origin of the internet feed by looking at the bottom left screen on a TV which displays the temperature of that locale. The temperature is in Fahrenheit and yet they try to find this display in Europe and Russia. The only country that would display this temperature in Fahrenheit is the US. Everybody else uses Celsius.
Trying to figure out who killed Sass, Adam says that every computer connects to the Internet and the application by means of a different port. This is not true. The application is listening to a specific port, that is used by all computers. Http for instance listens to port 80, ftp to port 21.
It is however possible to have applications and protocols use different ports, but this is way beyond the scope and capability of the regular user. So the suggestion to insert the network with a virus that leads him to a specific port is not a real helpful or promising one.
Obvious stunt double for A.J. Buckley during the fight between Garcia and Adam.
At the beginning of the episode, the iPad music app with the glittering squares is clearly shown to be a video for a second when the menu appears, even though Sass is interacting with it as if to do something with the music.